PHP cURL JSON Object formatting issues - php

Question

I'm running into an issue with formatting using the curl_setopt functions in PHP. I'm basically trying to re-create the cURL request below, but my code returns a bad request from the server. I'm pretty sure it has to do with poor formatting, but I can't figure out where I went wrong.
//This code returns the data back successfully
curl -H "Content-Type: application/json" -d '{"bio_ids": ["1234567"]}' http://localhost:9292/program
<?php //This code returns a bad request from the server
$bio = array('bio_ids'=>'1234567');
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => 'http://localhost:9292/program',
CURLOPT_POST => 1, // -d
CURLOPT_POSTFIELDS => $bio,
CURLOPT_HTTPHEADER => array('Content-Type: application/json'), // -H
));
$resp = curl_exec($curl);
curl_close($curl);
?>

Answer 1

There are two issues:
You need to make sure that the structure of $bio matches what you are expected to pass, so the $bio declaration needs to be:
$bio = array('bio_ids' => array('1234567'));
Secondly you need to json_encode this data structure before sending it to the server:
CURLOPT_POSTFIELDS => json_encode($bio),

Answer 2

<?php //This code returns a bad request from the server
$bio = array('bio_ids'=>'1234567');
$bio = json_encode($bio);
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => 'http://localhost:9292/program',
CURLOPT_POST => 1, // -d
CURLOPT_POSTFIELDS => $bio,
CURLOPT_HTTPHEADER => array('Content-Type: application/json'), // -H
));
$resp = curl_exec($curl);
curl_close($curl);
?>